<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="/login" method="post">
  username:<input name="username" type="text"><br>
  password:<input name="password" type="password"><br>
  <input type="submit" value="提交">
    <a href="/sign-in">注册</a>
</form>
</body>
</html>